1. Create your own double boiler by placing the chocolate in a small heatproof bowl.
2. Set this bowl on top of a pot that is filled with water.
3. Bring the water to a simmer, not boiling. Make sure the bottom of the top bowl does not touch the water below, but creates a seal with the bottom pan to trap the steam produced by the simmering water. Be careful that the water doesn't boil or splash into the chocolate, because any moisture will cause it to seize.